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| author | Vivek Goyal <vgoyal@in.ibm.com> | 2007-05-02 19:27:07 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:07 +0200 |
| commit | cfd243d4af7c7f8f52f5cb99d3932d9074b039ff (patch) | |
| tree | ae9b25a414117d0d39b535e5701d5a1b3f907558 /arch/x86_64/kernel/setup.c | |
| parent | bdb96a6614cfaba24e23dd9de4040c068c3af19b (diff) | |
| download | lwn-cfd243d4af7c7f8f52f5cb99d3932d9074b039ff.tar.gz lwn-cfd243d4af7c7f8f52f5cb99d3932d9074b039ff.zip | |
[PATCH] x86-64: Remove the identity mapping as early as possible
With the rewrite of the SMP trampoline and the early page
allocator there is nothing that needs identity mapped pages,
once we start executing C code.
So add zap_identity_mappings into head64.c and remove
zap_low_mappings() from much later in the code. The functions
are subtly different thus the name change.
This also kills boot_level4_pgt which was from an earlier
attempt to move the identity mappings as early as possible,
and is now no longer needed. Essentially I have replaced
boot_level4_pgt with trampoline_level4_pgt in trampoline.S
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/x86_64/kernel/setup.c')
| -rw-r--r-- | arch/x86_64/kernel/setup.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c index 65e2bc551a2b..0e2b8df0ea64 100644 --- a/arch/x86_64/kernel/setup.c +++ b/arch/x86_64/kernel/setup.c @@ -274,8 +274,6 @@ void __init setup_arch(char **cmdline_p) dmi_scan_machine(); - zap_low_mappings(0); - #ifdef CONFIG_ACPI /* * Initialize the ACPI boot-time table parser (gets the RSDP and SDT). |